Cartridges



O United States Patent 1 3,536,010

[72] Inventor Bengt Robert Wilhelm Moldeus [56] References Cited Dannemansvagen 181 41 Lindingo, UNITED STATES PATENTS Sweden 2 884,859 5/1959 Alexander et al 102/49.8X [2!] Appl. No. 761,686 Filed Sept. 23 1968 2,993,648 7/ 1961 Blackwell 102/49.7X [45] Patented Oct. 27, 1970 Primary ExaminerRobert F. Stahl Attorney-Karl W. Flocks [54] CARTRIDGES 1 Claim, 1 Drawing Fig.

[52] U.S.Cl 102/38,

l02/9, lO2/37.6, 102/63, 343/18 ABSTRACT: A cartridge includes a cartridge case and a pro [51] Int. Cl ..F42b 13/00, jectile having a propellent charge which after ignition F42b 5/00 develops a gas under pressure whereby there is discharged [50] Field of Search l02/9, 38, from the projectile a plastic composition which increases in volume upon contact with the atmosphere.

cAR'rRmoFs This invention relates to a cartridge including a cartridge case and a projectile.

Conventional projectiles are provided with explosive charges which in a suitable manner are caused to detonate after the projectile has been ejected from the cartridge case by means of the propellent charge therein.

' Such conventional projectiles are not suited for use as barrage defences against air attacks, since the projectiles must score direct hits on aircraft or pass relatively close to them in order to damage or destroy them. It has already been suggested to launch into the air before supposed air attacks objects intended to form barrage defences by floating in the air at different altitudes to serve as obstacles to, and damage or destroy, aircraft (aeroplanes, rockets and like missiles). Earlier, barrage balloons served this purpose.

The present invention thus relates to a cartridge for barrage defence purposes, including a cartridge case and a projectile. According to the invention this cartridge is characterized in that as counted from in front, the cartridge comprises in immediate succession an adjustable detonator, such as a fuse, adapted to cause a propellent charge in a chamber to detonate, i.e. to be ignited, and on combustion to develop a gas under pressure, a perforated disk separating the chamber containing the propellent charge from a chamber having a plastic composition therein, said perforated disk allowing the gas under pressure to escape therethrough and distributing it uniformly over the entire plastic composition in connection with the combustion of the propellent charge, and a rear plate terminating the projectile proper and having a nonle for shaping the plastic composition ejected through the nozzle by the gas under pressure, and in that there is provided in the cartridge case between the propellent charge for the projectile and the rear end plate of the projectile a pressure protective disk for protecting the shaping nozzle at the discharge of the projectile.

ln barrage defences the projectile functions so that the power unit in jet-propelled aircraft is stopped by the plastic composition being sucked thereinto or by the plastic composition having a damaging or destroying effect on the aircraft body or by the plastic composition actuating the release mechanisms in robots or remote-control projectiles to cause them to detonate in the air without resulting in any damage on the ground.

For a better understanding, the invention will now be more fully described in the following with reference to the accompanying drawing which shows a longitudinal section through the cartridge.

A projectile 5 is mounted in a known manner in a cartridge case 1 which incorporates apropellent charge 2. The projectile 5 is launched into the air by conventional means. When the projectile 5 has reached the desired altitude the fuse 9 causes the propellent charge to detonate, and the gas under pressure then arising in the chamber 8 via a perforated disk 7 ejects a plastic composition 6 through a nozzle 4 into the atmosphere where the composition forms units having a position of balance which is relatively stable with regard to the atmosphere. The nozzle is so dimensioned that the ejected composition which has increased its volume compared to the original volume when contained in the projectile, will be given a shape suitable for the purposes contemplated. At the launching of the projectile the nozzle is protected by a pressure protective disk 3.

The plastic composition 6 may consist e.g. of foam plastic which is caused to foam when the composition is ejected through the nozzle. The foam plastic may contain a certain amount of solids to increase its effect in the indicated respects but also to act in a radar reflecting manner.

lclaim: l. A cartridge including a cartridge case I and a projectile 5 comprising an adjustable detonator, such as a fuse 9, a first propellent char e positioned in a chamber 8 and adapted upon rgmtion 0 said fuse to develop a gas under pressure, a

perforated disk 7, a plastic composition, a chamber 6, for said plastic composition, said perforated disk allowing said gas under pressure to escape therethrough and distributing it uniformly over the entire plastic composition in connection with the combustion of the propellent charge, and means 4 forming a rear plate member terminating the projectile proper and defining a nozzle which imparts a suitable shape to said plastic composition as it is ejected through said noule, and said cartridge case is equipped with a pressure protective disk 3 for protection of said nozzle at the discharge of said projectile from said cartridge case by means of a second propellent charge 2 in said cartridge case. 

